/Engine/Source/Runtime/Engine/Classes/Engine/LevelStreaming.h
Given a level name, returns a level name that will work with Play on Editor or Play on Console
static [FString](API\Runtime\Core\Containers\FString) MakeSafeLevelName ( const [FName](API\Runtime\Core\UObject\FName) & InLevelName, [UWorld](API\Runtime\Engine\Engine\UWorld) * InWorld )